Brownfield engineering projects are among the most technically demanding activities undertaken within an aluminium smelter. Unlike a new (greenfield) facility, every modification inside an operating smelter must integrate with decades of existing infrastructure, often installed during multiple expansion and upgrade phases. Over time, plant layouts evolve, undocumented modifications occur, and original engineering drawings become outdated or incomplete.

For facilities such as Tomago Aluminium in Tomago NSW, accurate existing-condition information is essential before any engineering design, shutdown planning or equipment installation begins. Without reliable dimensional data, project teams risk discovering clashes, incorrect fabrication dimensions and unforeseen site conditions only after installation has commenced—when delays are most costly.

Hamilton By Design provides engineering-grade 3D laser scanning services that create highly accurate digital representations of existing assets. Using advanced LiDAR technology, millions of measurement points are captured in a matter of minutes, producing an engineering-quality point cloud that forms the foundation for mechanical design, structural engineering, Scan-to-CAD workflows and brownfield project delivery.

Whether your project involves replacing conveyors, upgrading process equipment or planning a major shutdown, laser scanning dramatically reduces uncertainty while improving safety, engineering confidence and project outcomes.

Why Accurate Measurement Matters in an Aluminium Smelter

Aluminium smelters operate continuously, twenty-four hours a day, every day of the year. Every hour of lost production has significant financial consequences, making shutdown windows tightly planned and carefully managed.

Unlike manufacturing facilities with spare production capacity, major engineering work often needs to occur within limited shutdown periods where multiple contractors work simultaneously.

This creates several engineering challenges:

Existing structures may not match historical drawings.
Pipework has often been modified over decades.
Equipment relocations are poorly documented.
Platforms and walkways have changed.
Electrical cable trays have expanded.
New services compete for limited installation space.
Structural members have been strengthened without drawing revisions.

Traditional surveying techniques simply cannot capture the complexity of these environments efficiently.

The Brownfield Engineering Challenge

Every brownfield project starts with one simple question:

What actually exists today?

Unfortunately, this is rarely easy to answer.

Many aluminium smelters have been operating for forty years or more. During that time, thousands of engineering changes may have occurred.

Common examples include:

Emergency repairs
Maintenance modifications
Temporary installations becoming permanent
Equipment replacements
Structural strengthening
Additional pipe supports
New cable routes
Instrument upgrades
Maintenance access improvements

Many of these modifications were completed under shutdown pressure where updating engineering drawings was understandably not the highest priority.

The result is that engineering teams often begin projects using documentation that no longer accurately reflects the physical plant.

Why Traditional Site Measurement Falls Short

Historically, engineers relied upon:

Tape measures
Total stations
Hand sketches
Photographs
Manual dimensions

While these methods still have their place, they become increasingly impractical inside large industrial facilities.

Consider attempting to measure:

40 metres of overhead pipework
Multiple elevations
Congested cable trays
Structural steel connections
Existing conveyors
Crane beams
Process vessels

Access alone may require elevated work platforms, confined space permits, scaffolding and isolation procedures.

Even after several days onsite, only selected dimensions have been captured.

If additional information is later required, another site visit becomes necessary.

How Engineering Laser Scanning Changes the Process

Laser scanning fundamentally changes how brownfield engineering projects are delivered.

Instead of recording hundreds of manual dimensions, terrestrial LiDAR scanners collect millions of highly accurate measurements covering the complete work area.

The result is an engineering-grade point cloud that accurately represents existing plant geometry.

This digital environment allows engineers to perform much of their work from the office rather than returning repeatedly to site.

Once captured, the scan data can be converted into accurate Scan-to-CAD models and engineering drawings, enabling mechanical, structural and piping designers to work confidently using verified as-built information.

Typical benefits include:

Complete site capture
Reduced survey time
Improved design accuracy
Fewer site visits
Better collaboration
Improved documentation
Reduced engineering risk

Typical Areas Scanned Within an Aluminium Smelter

Engineering projects commonly occur throughout the facility, including:

Potlines

Structural modifications
Busbar alterations
Access platform changes
Mechanical equipment installation

Casthouse

Furnace upgrades
Casting equipment
Overhead cranes
Hydraulic systems
Cooling systems

Carbon Plant

Conveyors
Crushers
Dust extraction
Structural supports
Material handling systems

Utility Systems

Cooling water
Compressed air
Natural gas
Fire services
Hydraulic systems
Electrical substations

Highly congested service corridors benefit significantly from comprehensive reality capture.

Supporting Shutdown Engineering

Shutdowns represent one of the highest-value applications for engineering laser scanning.

Every task within a shutdown depends upon accurate planning.

When equipment has already been fabricated, there is little tolerance for discovering dimensional discrepancies during installation.

Laser scanning supports shutdown engineering and brownfield project planning by providing:

Existing-condition verification
Installation planning
Crane access studies
Temporary works design
Pipe spool verification
Structural modification planning
Clash detection
Construction sequencing

The result is improved confidence before shutdown activities begin.

Mechanical Engineering Applications

Mechanical engineering projects commonly include:

Pump replacements
Conveyor upgrades
Chute redesign
Tank modifications
Ducting replacement
Pressure vessel connections
Machine foundations

Instead of estimating dimensions from old drawings, engineers can design directly against the current plant geometry.

This greatly improves fabrication accuracy.

Structural Engineering Benefits

Structural engineers frequently encounter undocumented modifications.

Laser scanning enables accurate modelling of:

Structural steel
Columns
Bracing
Platforms
Stairways
Handrails
Crane beams
Pipe supports

Existing structures can then be verified before additional loads are introduced.

Digital Twins and Asset Management

Laser scanning also provides the foundation for developing digital twins.

Rather than relying solely on historical drawings, operators gain access to an accurate digital representation of the physical plant.

Benefits include:

Asset management
Maintenance planning
Future project planning
Condition assessments
Engineering verification
Operator training
Long-term documentation

Where legacy equipment has little or no documentation, Hamilton By Design can also provide reverse engineering services to recreate accurate CAD models and manufacturing drawings directly from laser scan data.

Engineering Software Used

Hamilton By Design supports engineering workflows using industry-recognised software, including:

FARO Focus terrestrial laser scanners
FARO SCENE
Autodesk ReCap
Autodesk Navisworks
SOLIDWORKS
Autodesk Inventor
AutoCAD
AutoCAD Plant 3D
Revit
E57 point cloud exchange
STEP and Parasolid mechanical models

This enables seamless collaboration with engineering consultants, asset owners and contractors.

Typical Deliverables

Every project is tailored to client requirements, but deliverables may include:

Registered point clouds
E57 files
Autodesk ReCap projects (RCP/RCS)
Scan-to-CAD drawings
Existing-condition layouts
General arrangement drawings
Mechanical models
Structural steel models
Pipework models
Equipment verification
Clash detection reviews
Engineering mark-ups
As-built documentation

Why Tomago NSW Is an Ideal Application

Tomago is one of Australia’s most significant heavy industrial precincts, and engineering projects are continually undertaken to improve safety, reliability and production efficiency.

Many upgrades involve integrating modern equipment into infrastructure that has evolved over decades.

This makes accurate existing-condition information invaluable.

Laser scanning enables project teams to:

Reduce uncertainty
Improve engineering quality
Minimise shutdown risk
Support prefabrication
Improve contractor coordination
Reduce costly rework

For brownfield engineering, accurate information at the beginning of the project often determines the success of the entire installation.

Conclusion

Brownfield engineering projects succeed when decisions are based on accurate information. In aluminium smelters operating in Tomago NSW, where infrastructure has evolved over decades, relying on outdated drawings or incomplete measurements introduces unnecessary risk, delays and cost.

Engineering-grade laser scanning provides a reliable foundation for mechanical upgrades, shutdown planning, structural modifications and future asset management. By capturing millions of accurate measurements in a single survey, project teams gain confidence that new equipment will fit, fabrication can proceed with certainty, and installation risks are significantly reduced.

If your next project involves upgrading conveyors, replacing process equipment, modifying structural steel or planning a major shutdown, Hamilton By Design can deliver the accurate reality capture and engineering support needed to reduce uncertainty and keep your project moving forward. By combining advanced LiDAR technology with practical engineering expertise, we help aluminium smelter operators make better decisions, minimise rework and achieve safer, more efficient brownfield project outcomes throughout Tomago NSW.